package com.bonc.apicreator.utils;


import java.security.MessageDigest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


/**
 * MD5工具类
 *
 * @author gaopengyu
 * @version 2016年8月5日
 * @see Md5Util
 * @since
 */
public final class Md5Util {

    /**
     * 构造方法
     */
    private Md5Util() {

    }

    /**
     * 日志对象
     */
    private static final Logger LOGGER = LoggerFactory.getLogger(Md5Util.class);

    /**
     * Description: MD5加码 生成32位md5码
     * 
     * @param inStr
     * @return String
     * @see
     */
    public static String md5(String inStr) {
        MessageDigest md5 = null;
        try {
            md5 = MessageDigest.getInstance("MD5");
        }
        catch (Exception e) {
            LOGGER.error("MD5 Failed!", e);
            return "";
        }
        char[] charArray = inStr.toCharArray();
        byte[] byteArray = new byte[charArray.length];

        for (int i = 0; i < charArray.length; i++ ) {
            byteArray[i] = (byte)charArray[i];
        }

        byte[] md5Bytes = md5.digest(byteArray);

        StringBuffer hexValue = new StringBuffer();

        for (int i = 0; i < md5Bytes.length; i++ ) {
            int val = ((int)md5Bytes[i]) & 0xff;
            if (val < 16) {
                hexValue.append("0");
            }
            hexValue.append(Integer.toHexString(val));
        }

        return hexValue.toString();
    }

    /**
     * Description: 可逆的加密算法
     * 
     * @param inStr
     * @return String
     * @see
     */
    public static String kl(String inStr) {
        char[] a = inStr.toCharArray();
        for (int i = 0; i < a.length; i++ ) {
            a[i] = (char)(a[i] ^ 't');
        }
        String s = new String(a);
        return s;
    }

    /**
     * Description: 加密后解密
     * 
     * @param inStr
     * @return String
     * @see
     */
    public static String jm(String inStr) {
        char[] a = inStr.toCharArray();
        for (int i = 0; i < a.length; i++ ) {
            a[i] = (char)(a[i] ^ 't');
        }
        String k = new String(a);
        return k;
    }

}
